I was lookin at my TPS on my 84 GN and could not get a reading. Suggestions on what to do next hopefully not replace it! I tried loosening the screws a touch and gently tapping the tps to see if it was installed incorrectly by the previous owner and still nothing but now the service engine light comes on at idle and shuts off at around 1000-1200 rpms. the car seems to run better, smoother than before but i did just put the new CR 43 ts plugs in and took the Bosch plats out.